class RSpec::Core::Formatters::DeprecationFormatter::DelayedPrinter

def deprecation_summary
  return unless @deprecation_messages.any?
  print_deferred_deprecation_warnings
  deprecation_stream.puts RAISE_ERROR_CONFIG_NOTICE
  summary_stream.puts "\n#{Helpers.pluralize(deprecation_formatter.count, 'deprecation warning')} total"
end

def initialize(deprecation_stream, summary_stream, deprecation_formatter)
  @deprecation_stream = deprecation_stream
  @summary_stream = summary_stream
  @deprecation_formatter = deprecation_formatter
  @seen_deprecations = Hash.new { 0 }
  @deprecation_messages = Hash.new { |h, k| h[k] = [] }
end

def print_deferred_deprecation_warnings
  deprecation_stream.puts "\nDeprecation Warnings:\n\n"
  @deprecation_messages.keys.sort_by(&:type).each do |deprecation|
    messages = @deprecation_messages[deprecation]
    messages.each { |msg| deprecation_stream.puts msg }
    deprecation_stream.puts
  end
end

def print_deprecation_message(data)
  deprecation_message = deprecation_formatter.deprecation_message_for(data)
  @seen_deprecations[deprecation_message] += 1
  stash_deprecation_message(deprecation_message)
end

def stash_deprecation_message(deprecation_message)
  if @seen_deprecations[deprecation_message] < TOO_MANY_USES_LIMIT
    @deprecation_messages[deprecation_message] << deprecation_message.to_s
  elsif @seen_deprecations[deprecation_message] == TOO_MANY_USES_LIMIT
    @deprecation_messages[deprecation_message] << deprecation_message.too_many_warnings_message
  end
end